1 package de.juplo.kafka;
3 import lombok.RequiredArgsConstructor;
4 import lombok.extern.slf4j.Slf4j;
5 import org.apache.kafka.clients.consumer.ConsumerRebalanceListener;
6 import org.apache.kafka.common.TopicPartition;
11 @RequiredArgsConstructor
13 public class ApplicationRebalanceListener implements ConsumerRebalanceListener
15 private final ApplicationRecordHandler recordHandler;
16 private final AdderResults adderResults;
17 private final StateRepository stateRepository;
18 private final String id;
20 private final Set<Integer> partitions = new HashSet<>();
23 public void onPartitionsAssigned(Collection<TopicPartition> partitions)
25 partitions.forEach(tp ->
27 Integer partition = tp.partition();
28 log.info("{} - adding partition: {}", id, partition);
33 public void onPartitionsRevoked(Collection<TopicPartition> partitions)
35 partitions.forEach(tp ->
37 Integer partition = tp.partition();
38 log.info("{} - removing partition: {}", id, partition);
39 Map<String, AdderResult> state = recordHandler.getState(partition).getState();
40 for (String user : state.keySet())
43 "{} - Saved state for partition={}|user={}: {}",